The Navajo objection is not stopping anything
Ars Technica
As I understand US law, it is expected that reasonable accommodations to religious beliefs will be made. In general employers cannot expect Jews to work on Saturday, and should allow Muslims time for prayer - and so on. Even then, there are exceptions.
But this is not yet a legal matter. It’s simply a question of social pressure (and to be honest, there isn’t a pressing reason to send human ashes to the moon, and if it were done at scale it would be a waste of resources).
Abortion laws are a bit of a different matter. It’s very hard to prove that the motivation is religious rather than secular (even if it often is). We can only hope that the increasing harshness and cruelty of the anti-abortion movement inspires a political backlash which will sweep the responsible legislators from office.